yes, delete everything but the wallet.dat.
Thank you so much for the reply. That I know how to do (and have done many times).
Just so I know I'm on the same page, do I run the exact same wallet software that I currently have, or has there been an updated version I need to upgrade to?
Any devcoin software version should work if you remove the content of the subdirectories first. I tested a couple on Windows and Linux and they all synced well.